After struggling to become a success, Betty Miller and her all-girl orchestra finally hit pay dirt when crooner Herbie Fenton comes on board. Problems arise when Betty and her girls try to find backers to invest in Herbie and they sell 125 percent of him.

Broadway producer Earl Carroll was a Ziegfeld-like entrepreneur who staged lavish revues featuring attractive young ladies. Carroll's annual "Vanities" provided story material for three Hollywood films: Murder at the Vanities (34), A Night at Earl Carroll's (40) and Earl Carroll Vanities (45). This last film was produced by Republic Pictures, a bread-and-butter studio specializing in Westerns and serials; Republic had made musicals before, but few of them were expensive enough to allow for lavish production numbers. Earl Carroll Vanities is likewise rather threadbare, though some of the individual musical highlights aren't bad. The plot, such as it is, concerns financially strapped nightclub owner Eve Arden, who finagles Earl Carroll into staging one of his revues at her club.

A WW-II defense plant worker gets knocked out and dreams about helping the war effort in various ways, including solving a crime.

American correspondent Mike Malone uncovers a Nazi plot for an uprising of the Arab tribes in Lybia. Pursued by Sheik David and his men, Mike takes refuge in the suite of Nancy Brooks, who is in the British Intelligence. He asks her to hide a gun and escapes through a window. Reporting the affair to British Consul Herbert Forbes, the latter tries to discourage him from further investigation, as the British are aware of the plot and are planning on staging a coup. He goes with Mike to Nancy's apartment, and she denies having ever seen him before. Sheik Ibrahim, next in command of the Arab tribe to Sheik David, is plotting with Nazi agent Yussof Streyer to kill David who is friendly with the British. Mike and Nancy have gone to David's camp, escape from Ibrahim's henchmen, and get back to El Moktar before the Arabs attack the garrison.

A popular band joins the army with the idea of putting on shows for troops overseas. During rehearsals, a battle erupts and the musicians must exchange their musical instruments for guns and fight.

The day after Carol returns from a European trip, she wakes up to find her dead father's creditors hauling everything away. Her aunt wants her to marry a millionaire, but Carol insists on getting a job.

A crooked producer makes money from Broadway flops by selling more than 100% interest to multiple parties. He only fails if it makes a profit.